Couple good sites to check out:
Drug-War Related:
http://www.drugwarfacts.org/ (Drug War Facts)
http://www.norml.org/ (Since its founding in 1970, NORML has provided a voice in the public policy debate for those Americans who oppose marijuana prohibition and favor an end to the practice of arresting marijuana smokers. A nonprofit public-interest advocacy group, NORML represents the interests of the tens of millions of Americans who smoke marijuana responsibly.)
http://november.org/ (The November Coalition, sign up for their news/email, some good information)
Other:
http://www.eff.org (The Electronic Frontier Foundation)
http://fff.org/whatsnew/ (The Future of Freedom Foundation)
http://ffrf.org/index.php (Freedom from Religion Foundation)